Knife oscillating device



8- 1933- E. B. KERST El AL 1,922,959

KNIFE OSCILLATING DEVICE Filed March 4, 1932 2 Sheets-Sheet 1Ewen/Z5715.- 6 if 6 /742,715. I'IEPJfi ga -5%??? Aug. 15, 1933. KERsT ETAL 1,922,959

KNIFE OSCILLATING DEVICE Filed March 4, 1932 2 Sheets-Sheet 2 %W1u3 a gwu Patented Aug. 15, 1933 1,922,959

UNITED STATES PATENT'OFFlCE V 1,922,959 KNIFE OSCILLATING DEVICE EdgarB. Kerst and Alpheus 0. Hurxthal, Philadelphia, Pa., ass'ignors toProctor & Schwartz, Incorporated, Philadelphia, Pa., a Corporation ofPennsylvania 7 Application March 4, 1932. Serial No. 596,886

8 Claims. (01. 18-15) This invention relates to devices arranged tospectively. The bearings 6 and '7 are adapted to chill and solidifyplastic material, such as soap, rotatably and slidably support trunnions8 and 9 in the form of a thin film or layer on a conprojectingrespectivelyfroni the opposite ends of tinuously moving carryingsurface, such as. the a blade carrier 10. i

peripheral surface of a chilling roll, where the Secured to andprojecting below the carrier material is finally scraped from the rollin the 10 is the scraper blade 11, the weight of the carform of chips.rier 10 disposed at the opposite sides of the axes Heretofore it hasbeen the practice to provide of the trunnions 8 and 9 providing thenecessary a stationary scraper having a more or less resilweight torotate the trunnions 8 and 9 within 10 ient contact with the carryingsurface of the their bearings and thereby press the blade 11 intochilling roll and set at an angle with respect to scraping contact withthe peripheral surface 3 the surface of the roll to scrape the materialof the roll 2. from the roll as the roll is rotated with respect 'In thepresent instance the trunnion 8 is proto the scraper. vided with a camfollowerin the form of a roller 15 In devices of this kind when the filmof mate- 1 2, which is adapted to bear against a cam surrial on thesurface of the roll is exceptionally face 13 arranged to movesubstantially with they thin, such for example as about 5/ 1000ths of ancarrying surface 2 of the roll 1. In the present inch in thickness,required by soap manufacturers instance, the cam surface 13 is formed onone at the present time in order that the soapchips side face of a camwheel 14 which is rigidly sewill dissolve instantly, the material, as itconcured to a shaft 15 that is rotatably mounted tacts with the scraper,has a tendency to back in the bearing 6 below the trunnion 8 of thecarup on the surface of the roll, thereby increasing rier 10. r thethickness of the film substantially twice its Also secured to the shaft15 in the present innormal thickness before the material will chipstance is a sprocket 16 which is operatively con- 25 off the surface ofthe roll. a nected by means of a chain or belt 17 with a One object ofthe present invention is to elimsprocket 13 rigidly secured to one ofthe truninate the backing up of the material andthe connions 4 of theroll 2, so that as the roll 2 is rosequent thickening of the chips asthe matetated the cam wheel 14.- will be correspondingly -rial isremoved from the roll. rotated and through the cam surface 13 thereofThe construction and operation of the mechaand the cooperating camfollower 12 on the outer nism forming the subject of the presentinvenend of the trunnion 8 of the carrier 10, said cartion will be fullydisclosed hereinafter, referrier with the scraping blade 11 will bemoved in ence being had to the accompanying drawings, one directiontransversely of the peripheral surof which: face 3 of the roll 2 inopposition to a spring 19 3 Fig. 1 is a face view of a portion of achilling confined within the bearing 7 in which the oproll with themechanism of the present invenposite trunnion 9 of the carrier 10 ismounted.

tion applied thereto; One end of the spring 19 bears against a col- Fig.2 is the sectional elevation taken on the lar 20 secured to the trunnion9 while the opline 2-2, Fig. 1; posite end of said spring bears againstan abut- 4 Fig. 3 is a view similar to Fig. 1, showing an ment 21confined within the bearing 7. The alternative construction; andabutment plate 21 is adjustable axially of the Fig. 4 is af'transversesectional elevation taken trunnion 9 and the bearing '7 by means of anon the line 44=, Fig. 3. adjusting screw 22 tapped into the outer end 23In the accompanying drawings, the frame of of the bearing 7 and engagingthe outer side of 45 the machine is illustrated at 1. The chilling theabutment plate 21. The spring 19 is adapted roll is diagrammaticallyillustrated at 2 with a to move the carrier loand the scraper 11longifilm of material at carried by and adhesively contudinally and in adirection opposite to that protacting with the peripheral surface 3 ofthe roll vided by the cam 13 and the cam follower 12. 2. The roll 2 isprovided with trunnions 4 which Moving the scraper blade 11 transverselyof 50 are rotatably mounted insuitable bearings car-. the peripheralsurface 3 of the roll 2, as the roll ried by'the side frames of themachine and no is rotated in the direction of the arrow in Fig. 2,.shown in the present drawings. provides a shearing action between theperiph- Secured to and projecting upwardly from the eral surface of theroll 2 and the relatively bevside frames 1, 1 of the machine arebrackets 5, 5, eled edge of the blade 11, whereby the film as is no towhich are rigidly secured bearings 6 and 7 resheared from the surface 3of the roll 2, in place of face 3 of the chilling roll 2.

the surface of the roll prevents the blade or the surface of the rollfrom being worn in local spots, such as occurs with the non-oscillatingblade, due to unequal hardness in various portions of the blade or ofthe peripheral surface of the roll with which the blade contacts.

In order to prevent excessive rotation of the blade carrier 10 thatwould possibly react to cause the blade 11 to jump or vibrate on thesurface 3 of the roll 2, the trunnion may be provided with a pinarranged more or less loosely fitting and sliding in a groove or slot 26formed in the bearing 6, such pin 25 having such a sliding fit in theslot 26 as to permit slight'rotation of the carrier 10 to press theblade 11 resiliently against the surface 3 of the roll 2 but preventinga reacting rotation of the carrier 10 that would cause. the blade 11 tobe moved out of cooperating relation with respect to the surface 3 ofthe roll 2. This limiting of the rotation of the carrier 10 andconsequently the'trunnion 8 thereof is desirable to keep the roller .12in correct operative engagement with the cam surface 13 In'thealternative construction shown in Figs. 3 and 4 the blade 111 is clampedin the carrien 110 by means of a clamp plate 30 secured to the carrier110 by means of bolts 31. The carrier is provided at one end with atrunnion 109 rotatably' and slidably mounted in a bearing 10"]. Theopposite end of the carrier 110. is rotatably mounted on one end of ashaft 108 which is slidably mounted in a bearing 106 and prevented fromrotating in said hearing by means of a key 125, the opposite end of theshaft 108 being provided with a-cam roller 112 riding between andadapted to be engaged at diametrically opposed points by substantiallyparallel cam surfaces 113 of a cam element 114. The cam element 114 isrotatably mounted on a stud shaft 115 rigidly attached to and projectingfrom one side'of the bearing 106. I 7

On the hub 114a of the cam element 114 is a sprocket 116 by which thecam 114 is rotated, the cam element being held against axial movementwith respect to the stud 115 by the collars and 36 rigidly secured tothe shaft 115.

Rotation of the cam 114 will cause positive axial reciprocation of theshaft 108 and consequently a corresponding reciprocation of the carrier110 and blade 111 transversely of the peripheral sur- For this purposeand in order to permit free rotation of the carrier 110 with respect tothe shaft 108 the said carrier is provided with a bearing into whichprojects 'and freely rotates the one end 41 of the shaft 108, said shafthaving an axially aligned reduced portion e2 passing through an opening43 formed 7 in an end wall 44 of the bearing 40 and provided outside thesaid wall with a collar i5, whereby longitudinal reciprocation of theshaft 108 will be transmitted to. the carrier 110, at the same timepermitting. the carrier 110 to rotate freely about the shaft 108 whilesaid shaft is held against such rotation by the key 125 co-acting with acorrespondingly formed groove 126 in the bearing 106.

By this mechanism the spring 19in the bearing roll and rotatabletherewith, a cam follower co- '7, which is arranged to move the carrier10 in a direction opposite to that in which the carrier is moved by thecam surface 13, is eliminated and the blade carrier and the blade aremoved positively in both directions by the action of the cam surfaces113, 113.

We claim:

1. The combination of a roll having a peripheral surface arranged tocarry a layer of material on and in adhesive contact therewith, ascraper extending across and in contact with the carrying face of theroll, means for reciprocating the scraper longitudinally and relative tosaid carrying face to remove the material therefrom co1nprising a camsurface movable with the carrying surface, a cam follower cooperatingwith the said cam surface and operatively connected to the scraper tomove the scraper in one direction, and resilient means for moving thescraper in an opposite direction.

2. The combination of a roll having a. peripheral surface arranged tocarry a layer of material on and in adhesive. contact therewith, a knifeblade extending across and in contact with the carrying face of theroll, a carrier for said blade, a trunnion at each end of said carrier,for rotatably and slidably supporting said carrier, a cam adjacent oneside of saidroll and rotatable therewith, a cam. follower cooperatingwith said cam and operatively connected to said carrier for moving theblade longitudinally and relative to the carrying face of the roll, andmeans for rotating the carrier about the axes of said trunnions to pressthe blade against the carrying face of the roll under predeterminedpressure. 1

3. The combination of a roll having a peripheral surface arranged tocarry alayer of material. on and in adhesive, contact therewith, a

knife'blade extending across and in contact with the carrying face ofthe roll, a carrier for said blade, a trunnion at each end of saidcarrier, a bearing. for rotatably and slidably supporting each trunnion,a cam adjacent one side of the operating with said cam andoperativelyconnected'to one of said trunnions to move the carrier andthe blade in one direction longitudinally of. the blade, and resilientmeans cooperating with the other of said trunnions for moving thecarrier and the blade in an opposite longitudinal direction.

4. The combination of a roll having a peripheral surface arranged tocarry a layer of material on and in adhesive contact therewith, a knifeblade extending across and in contact with the 1 I carrying face of theroll, a carrier for said blade, a

trunnion at each end of said carrier, a bearing for rotatably andslidably supporting each trunnion, a cam adjacent one side of the rolland rotatable therewith, a cam follower cooperating with said cam andoperatively connected to one of said trunnions to' moventhe carrier andthe blade in one direction longitudinally of the blade, and

resilient means cooperating with the other of said trunnions for movingthe carrier and the blade in an opposite longitudinal direction andcomprising a spring confined in the bearing for the last said trunnionbetween an abutment on the trunnion and an abutment in the bearing.

' '5. The combination of a roll having a peripheral surface arranged tocarry a layer of material on and in adhesive contact therewith, a knifeblade extending across and in contact with the carryingface of the roll,a carrier for. said blade,

a trunnion at each end of the carrier, a bearing for rotatably andslidably supporting each trunnion, a cam follower carried by and on theend of one of said trunnions, a cam cooperating with said cam followerto move the carrier and the blade longitudinally and elative to thecarrying face of the roll, and A we" ht on the carrier tending to rotatethe cartrier and the blade about the axes of said trunnions to press theblade against the carrying face of the roll under predeterminalpressure.

6. The combination of a roll having a peripheral surface arranged tocarry a layer of material on and in adhesive contact therewith, a knifeblade extending across and in contact with the carrying face of theroll, a carrier for said blade, a trunnion at each end of the carrier, abearing for rotatably and slidably supporting each trunnion, a camfollower carried by and on the end of one of said trunnions, a camcooperating with said cam follower to move the carrier and the bladelongitudinally and relative to the carrying face of the roll in onedirection, and resilient means cooperating with the other of saidtrunnions to move the blade and its carrier in the opposite direction.

7. The combination of a roll having a peripheral surface arranged tocarry a layer of material on and in adhesive contact therewith, a knifeblade extending acrossand in contact with the carrying face of the roll,a carrier for said blade, a trunnion at each end of the carrier, abearing for rotatably and slidably supporting each trunnion, a camfollower carried by and on the end of one of said trunnions, a camcooperating with said cam follower to move the carrier and the bladelongitudinally and relative to the carrying face of the roll in onedirection, resilient means cooperating with the other of said trunnionsto move the blade and its carrier in the opposite direction, and aweight on the carrier tending to rotate the carrier and the blade aboutthe axes of said trunnions to press the blade against the carrying faceof the roll under predetermined pressure.

8. The combination of a roll having a peripheral surface arranged tocarry a layer of material on and in adhesive contact therewith, a knifeblade extending across and in contact with the carrying face of theroll, a carrier for said blade, a trunnion at each end of said carrier,a bearing for slidably supporting each trunnion, a cam follower on oneof said trunnions, a double faced cam acting against opposed points onsaid cam follower to reciprocate the carrier and the bladelongitudinally of and relative to said carrying face, means forpreventing rotation of the follower carrying trunnion, and means forpermitting rotation of the blade carrier relative to the last saidtrunnion.

EDGAR B. KERST. ALPHEUS O. HURXTHAL.

